Frictional driving-gear



(No Model.)

H. EXLEY.

FRIGTIONAL DRIVING GEAR.

N0. 364 997. Patented June 14, 1887.

IIIIIIII UNITED STATES PATENT OFFICE.

HENRY EXLEY, OF FRANKLIN, MASSACHUSETTS.

FRICTIONAL DRIVING-GEAR.

SPECIFICATION forming part of Letters Patent No. 364,997, dated June 14, 187.

(No model.)

To all whom it may concern:

Be it known that I, HENRY EXLEY, a citizen of the United States, residing at Franklin, in the county of Norfolk and State of Massachusctts, have invented certain new and useful Improvements in Frictional Driving-Gear. of which the following is a specification, reference being had therein to the accompanying drawlugs.

My invention relates to improvements in frictional driving gear for running sewing and other machines in factories and other places; and it consists of a novel combination of devices and peculiar construction and arrangement of parts, substantially as hereinafter fully set forth, and particularly pointed out in the claims.

My invention relates to improvements in that class of frictional drivinggear in which the belt-pulley employed to impart motion to the sewing or other machine may be caused to revolve through the action of afriction-pulley mounted on a shaft j ournaled in a rocking bearing, which is pivoted to an upright or standard and adapted to be forced out to throw the friction-wheel in contact with a constantly-rotating drivingpulley fastened to a counter-shaft, the friction-pulley being caused to bear against the driving-pulley by the action of the treadle under the control of the operator, so that the motor can be thrown into and out of action at will by simply relieving or applying pressure to the trcadle, the said frietion-wheel retiring from contact with the driven pulley when the operator releases the treadle, and returning to its normal position in contact with the drivingpulley through the action of a spring connected with the rocking bearing.

The primary object of my invention is to provide an improved driving-gear of the class specified, in which the spring is connected at one end with the treadle of the motor to draw the same and the rocking bearing toward each other when pressure is released from the treadle, and thereby simplify and cheapen the cost of the motor.

In the accompanying drawings, which illustrate a frictional driving-gear for sewing and other like machines embodying my present improvements, Figure 1 is a side elevation showing the friction-wheel in contact with the driving-pulley. Fig. 2 is a top plan View thereof. Fig. 3 is an end elevation. Figs. 4 and 5 are detached perspective views of the rocking bearing and treadle.

Referring to thedrawings, in which like letters of reference indicate corresponding parts in all the figures,.A desigi'iatcs avertical standard or post, which is cast or formed integral with a bed-plate, (I, having suitable transverse openings, through which are passed screws or bolts to rigidly and in'nnovably secure the standard in place. This standardris formed with a laterally-projecting lug, a, near its upper end, and to this lug is pivoted a rocking bearing, B, said bearingbeing formed or cast in a single piece. This bearing is pivoted at an intermediate point of its length on a suitable pin or bolt, I), and the lower end of the bearing is extended a considerable distance below its pivot. At the lower extremity of this hearing an arm is formed by extending the bearing, and the arm is provided on its outer face with a fixed pin, 0, formed integral therewith, which is adapted to fit in a slot, (1, formed in a vertical or inclined arm, (2, fixed on the inner end of the treadle D. The treadle is arranged in substantially a horizontal position near the lower-end of the standard, and the slotted arm is cast on the inner end of the treadle, and an enlarged foot-piece, d, is formed on the outer end of the treadle, on which the foot of the operator is adapted to press. The lever is pivoted at or near its inner end on a pin or bolt, 0, which is fixed or secured in a standard. The upper end of the rocking bearing is bifurcated, and thereby provides two diverging arms, E, in the upper end of which are formed the shells f for the journal-bearings F, the upper ends of the shells being opened and closed by removable caps f, held or fixed in place by suitable devices-as, for instance, screws, as shown. A horizontal shaft, G, is journaled in the bearing F, and to this shaft is rigidly affixed or secured a friction-wheel, H, that is arranged between the diverging arms of the rocking bearing, and has its periphery covered by a friction-band of any preferable material-such, for instance, as paper, leather, $30. This shaft G is provided at a suitable point outside ofthe arms of the rock ing bearing with a band pulley or pulleys, 9, over which. passes a belt or belts to run the sewing or other machine, and the frictionwhecl of the shaft is adapted to come in contact with the periphery of a driving-pulley, I, mounted on a counter-shaft, 1,'as shown.

.T designates the coiled spring,which is connected at its lower end to the treadle at a point beyond the pivot thereof, and at its upper end to a fixed standard, as shown. The function of this spring is to normally elevate the outer end of the treadle, so that it is in a position for immediate operation at all times, and depress the inner end thereof, so that one of the sides of the slot in the arm'will throw the rocking bearing 'rcarwardly, and thus Withdraw thefriction-wheel from the driven pulley. It W-lllqthllS beseen. thatthe single spring performs two functions,and .therebydispenses with separate springs or separate weights for performing the results attained by the one spring, wherebythe number of parts are reduced and thestructure'. correspondingly simplified and cheapeued. A- segmental shoe, l, is rigidly affixed. to the upper endvof. the standard and arranged; so that its. curved face will. come in contact with the friction-wheel, to thereby retardand arrest: the motionof. the same when itnisreleased from contact with the drivingpulley, to normally elevate its free end, asand.

frictioawheel out of. contact with-the drivingj pulley. To.throw the frictionswheel into con 5 taetwiththe driving-pulley and thereby ro- 4o rate-thehorizontalshaft. and the be1t-pulleys thereon, the foot is applied to the lever to overcome the force of the spring and depress the lever, so that the slotted arm will ridemachines, the combination of a suitable standard, a rocking bearing pivoted to the standard and having an arm extended below the said pivot, afriction-wheel mounted on a suitable shaft, a treadle supported on apivot and connected near its pivotal point to the arm of the bearing to move the latter, and a retract,- ing-spring connected to the free end ot the treadle to normally elevate the same and throw. 1 the rocking bearing rcarwardly, as and forthe purpose described.

2. In a frictional driving-gear for sewing- ,machines, the combination of a suitable standard, a rocking bearing pivoted to the standard at anintermediate pointofits lengthand having the arm'extended below its pivot'and provided: with the pin, a shaft journaled. in.

the rocking bearing, a frictionwvheel, a pivoted trcadle carryinga slotted arm fixed-thereto, in-which the pin is fitted, and a spring con- .nected to the treadle to normally elevate the free end and to throw the rockingbearing. rearward'ly, as and for the purpose described.

In testimony whereof'I affix my signature in presence oftwo witnesses.

HEN-RY EXLEY; Witnesses:

ARTHUR J. OLAPP, CHARLES B. LOWELL. 

